Humic substances: their structure and function in the biosphere/proceedings
631.417 I61H
Humic substances: their structure and function in the biosphere/proceedings
-- Wageningen : Centre for Agricultural , 1975
184255 368p.: ill.,tab
Humic substances: their structure and function in the biosphere/proceedings
-- Wageningen : Centre for Agricultural , 1975
184255 368p.: ill.,tab